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“Expect to be exhausted, and that’s okay! I’ve given up apologising for being tired and needing to hit the hay early – it’s totally tiring, so sleep, when it’s available, must be grabbed with both hands.”

“Your priority should be to help the older two children feel like the new baby is a good addition to the family. Make sure the baby gives each sibling a present when they are first introduced, so they feel special and that they have a connection straight away. Our little girl gave her two brothers their gifts when they came to the hospital to meet her, and they hit it off straightaway.”

“Be as prepared as you can be. Make sure you have food in so you don’t have to battle the supermarket with all three kids, have clothes laid out for the following day and have backpacks packed the night before. You never know what a morning is going to throw at you.”

The Duchess after giving birth to George in 2013 (Dominic Lipinski/PA)

5. Petra Wright, a mother of three from Bristol who uses the babysitting app bubble

“Accept help when it’s offered. Crack the bedtime routine early, because you can’t face the world without sleep.”

6. Agnes Foryszewska, a mother from Birmingham

“Be systematic, five minutes means five minutes. If you start them from an early age, they should hopefully learn by the time they get to 21!”

Kate emerges from hospital after giving birth to Charlotte in 2015 (Daniel Leal-Olivas/PA)

7. Merle Rees, a mother from Manchester

“Make jobs fun so they are helping without realising, and enjoy the help whilst it lasts.”

8. Alison Bell, a mother from Nottingham

“Love them all equally, but treat each one differently, as they are all unique.”